Material reducing apparatus



Dec. 13, 1960 Y L. K. KNIGHT 2,964,249

"MATERIAL REDUCING APPARATUS Filed Oct. 6, 1959 2 Sheets-Sheet 1 Y m 5 m. /fiJ Q Q; x m w i 112: z 7 m m Hm Wu J m I .J, .n Egg @3563? a H J W IM L C 8 0m m\\\ U 5 v. a

L. K. KNIGHT MATERIAL REDUCING APPARATUS Dec. 13, 1960 -2 Sheets-Sheet 2 Filed 001;. 6, 1959 h N- um mm am 8 INVENTOR; OYD K. KNIGHT,

Om Q E United States Patent 2,964,249 MATERIAL REDUCING APPARATUS Lloyd K. Knight, Columbus, Ohio, assignor to The 'Jelfrey Manufacturing Company, a corporation of Ohio Filed Oct. 6, 1959, Ser. No. 844,777 1 Claim. (Cl. 241-230) The instant invention relates to material reducing apparatus of the type generally known as a crusher, and more particularly to the means for adjusting the material reducing drums included in the apparatus.

It is an object of the instant invention to provide a material reducing apparatus including improved means for adjusting the position of the material reducing drum in the apparatus.

It is another object of the instant invention to provide a material reducing apparatus comprising improved adjusting means for adjusting the materialreducing drum parallel to itself, including an adjusting frame connected to the opposite ends of the material reducing drum for making the adjustment thereof.

It is a further object of the instant invention to provide a material reducing apparatus including improved adjusting means for the material reducing drum thereof including an adjusting frame connected to the material reducing drum, and means for fixedly securing the adjusting frame in selected position for thereby locating the drum in selected position.

It is also an object of the instant invention to provide a material reducing apparatus including improved means for adjusting the material reducing drum thereof having an adjusting frame connected to the drum for adjusting the position of the drum, with yieldable means being'interposed between the adjusting frame and the drum for yieldably locating the drum in selected position, and

means for fixedly securing the adjusting frame in selected position.

It is still another object of the instant invention to provide a material reducing apparatus having an adjust able material reducing drum and flexible chain drive means for rotating the drum, with take-up means for the chain drive means connected to the drum structure to be adjusted therewith for maintaining a uniform tension in the chain drive means.

Other objects of the invention will appear hereinafter, the novel features and combinations being set forth in the appended claim.

In the accompanying drawings:

Fig. 1 is a side elevational view of the material reducing apparatus embodying the instant invention;

Fig. 2 is a plan view of the material reducing apparatus;

Fig. 3 is a partial sectional view of the material reducing apparatus taken on the line 33 in Fig. 2;

Fig. 4 is a partial sectional view of the material reducing apparatus taken on the line 44 in Fig. 3; and

Fig. 5 is an elevational view of the adjusting frame structure taken on the line 55 in Fig. 2. N

Referring to the drawings, there is illustrated therein a material reducing apparatus of the type commonly known as a crusher, and having two material reducing drums or rolls 14, 15. The material reducing apparatus 10 comprises a main frame 11 having oppositely disposed base plates 12, one at each side of the main frame 11. A housing 13 is built up of plates on the base plates 12 and forms a material reducing chamber. Within the housing 13 there is disposed the material reducing drums 14, 15. Above the housing 13 there is a hopper 16 to which the material to be reduced is delivered, whence it drops into the housing or material reducing chamber 13, to be acted upon therein by the material reducing drums 14, 15, which are formed on their peripheries with a plurality of suitable hammers or teeth 17 to reduce the material by a grinding, crushing and impacting action.

The material reducing drum 15 is supported on a shaft 18, the opposite ends of which are rotatably held by bearing blocks 19 disposed one at each side of the main frame 11 on the base plates 12. An upper rail 20 at each side of the main frame 11 extends longitudinally of the main frame 11 in alignment with the'base plates 12. The upper rails 20 are spaced vertically from the base plates 12 and lie above the bearing blocks 19, the

latter being secured in fixed, position between the base plates 12 and the upper rails 20. The upper rails 20 are secured to the base plates 12 by suitable upright frame members 21, to form the upper rails 20 as a part of the main frame 11.

One end of the shaft 18 has secured thereto a gear 22 which is meshed with a pinion 23 secured to one end of a shaft 24. The shaft 24 is rotatably supported by a pair of bearings 25. The outermost end of the shaft 24, beyond the pinion 23, has secured thereto a drive wheel 26 to which power is delivered for driving the pinion 23 and the gear 22 for rotation of the material reducing drum 15.

The material reducing drum 14 is supported on a shaft 30, which is rotatably held at its opposite ends by bearing blocks 31. The bearing blocks 31 are disposed at opposite sides of the main frame 11 between the base plates 12 and the upper rails 20. Each base plate 12 is formed with a track 32 extending longitudinally of the main frame 11, and each upper rail 20 is formed with a track 33 also extending longitudinally of the main frame 11 and disposed above the track 32 in alignment therewith. Each bearing block 31 is formed with a rib 34 at the bottom thereof which fits the track 32 and is seated therein, thereby guiding the bearing block 31 for longitudinal sliding movement along the base plate 12. The top of each bearing block 31 is similarly formed with a rib 35 adapted to fit the track 33 in the upper rail 20, thereby also guiding the top of the bearing block 31 for longitudinal sliding movement along the upper rail 20. Thus, each bearing block 31 is slidably supported in the main frame 11 between the base plate 12 and an upper rail 20 for adjustment of the positions of the bearing blocks 31 in a longitudinal direction, thereby also adjusting the position of the material reducing drum 14 relatively to the material reducing drum 15.

The end of the shaft 18 opposite that to which the gear 22 is secured, has secured thereto a chain sprocket 36. A similar chain sprocket 37 is secured to one end of the shaft 30 in alignment with the chain sprocket 36. A drive chain 38 is engaged with the teeth of the sprockets 36, 37 to transmit the drive from the shaft 18 to the shaft 30 for rotating the material reducing drum 14 with the material reducing drum 15. The drive between the material reducing drums 14, 15 also includes an idler sprocket 39 disposed beyond the sprocket 37, and a take-up sprocket 40 also locatedbeon a fixed shaft 41 secured in any suitable manner to the main frame 11. The takeup sprocket 40 is rotatably mounted on a shaft 42 which is secured to a slide 43. The slide 43 is supported by a longitudinally extending guide 44 formed with upper and lower guide rails 45' between which the slide 43 is retained for sliding movement longitudinally of the main frame 11. The slide 43 includes a longitudinally extending spring guide 46 which extends through a collar 47 fixedly secured to the guide 44. A spring 48 is mounted on the spring guide 46, with one end of the spring 48 bearing against the collar 47, and nut and washer elements 49 threaded on the end of the spring guide 46 hearing against the opposite end of the spring 48. The spring 48 acting on the slide 43 through the spring guide 46, pulls the take-up sprocket 40 in a longitudinal direction to constantly apply tension to the drive chain 38, thereby taking up any slack in the latter. The guide 44 is secured to the adjacent bearing block 31 by a mounting plate 54. Thus, when the bearing blocks 31 are adjusted for adjustment of the position of the material reducing drum 14 the guide 44 is also adjusted.

A spring guide rod 50 is secured to, and extends rearwardly from, each bearing block 31. A coil spring 51 is supported on each spring guide rod 50 and extends between the bearing block 31 and an adjusting frame 52. The end of each spring guide rod 50 extends throughthe adjusting frame 52 and a nut 53 is threaded on the end of each spring guide rod 50 to maintain the adjusting frame 52 in assembly with the bearing blocks 31. The springs 51 are thus interposed between the adjusting frame 52 and the bearing blocks 31. Since the adjusting frame 52 is fixedly secured on the main frame 11, as will be described hereinafter, and the spring guide rods 50 are reciprocable through the adjusting frame 52, the bearing blocks 31 may slide rearwardly towards the adjusting frame 52 by compression of the spring 50. Such movement of the bearing blocks 31 will occur when large pieces of material are fed into the housing or material reducing chamber 13, and such load is imposed upon the material reducing drums 14, 15 that they are separated by movement of the material reducing drum 14. It is this movement of the material reducing drum 14 that causes the bearing blocks 31 to slide between the base plates 12 and the upper rails 20, and the springs 50 act to oppose the movement, and also restore the material reducing drum 14 to its initial position when the excessive load leaves the material reducing drums 14, 15.

The adjusting frame 52 is slidably supported on the rails 55 at the rear of the main frame 11 beyond the housing 13. At each side of the adjusting frame 52 there is a longitudinally extending rod' 56, each secured to the adjusting frame 52 by a pin 57. The rods 56 extend rearwardly from the adjusting frame 52 through a rear wall 58 of the main frame 11. A plurality of shims 59 of selected thicknesses are interposed between the adjusting frame 52 and the rear wall 58, and the adjusting frame 52 is drawn up tight against the shims 59 and the rear wall 58 by a plurality of nuts 60 and threaded on the ends of the rods 56. Thus, the adjusting frame 52 is maintained in fixed position on the main frame 11. It will be understood that any combination of shims 59 may be interposed between the adjusting frame 52 and the rear wall 58 for locating the adjusting frame 52 in any selected position, which of course controls the position of the material reducing drum 14 relatively to the material reducing drum 15. Each of the shims 59 is formed with a notch 61 by which the shims 59 are fitted on the rods 56. A shelf 62 is secured to and extends laterally from each rail 55 to support the shims 59 between the adjusting frame 52 and the rear wall 58.

For the purpose of moving the adjusting frame 52 there is provided a double acting hydraulic cylinder 63 having laterally extending pins 64 adapted to be seated in a saddle 65 for holding the cylinder 63 in fixed position. The piston rod 66 is secured to the rear of the adjusting frame 52 by a pin 67. A hand pump 68 is connected to the cylinder 63 and'is used to operate the latter for reciprocating the piston rod 66 backwards or forwards as may be desired to properly locate the adjusting frame 52 and the material reducing drum 14. Following this operation the shims 59 are inserted between the adjusting frame 52 and the rear wall 58 and the nuts 60 are threaded on the ends of the pins 56 for drawing the adjusting frame 52 up tight against shims 59 and the rear wall 58, thereby fixedly securing the adjusting frame 52 in selected position on the main frame 11.

The adjusting frame 52 is connected to the opposite ends of the material reducing drum 14, and accordingly, is operative to adjust the position of the drum parallel to itself. The springs 51 which are interposed between the bearing blocks 31 and the adjusting frame 52 are relatively rigid and will not give during the adjustment of the material reducing drum 14, although the springs 51 will yield in response to excessive loads imposed on the material reducing drums 14, 15. When the material reducing drum 14 moves in response to an excessive load, the guide 44 which supports the take-up sprocket 40 will also shift position, since the guide 44 is connected to a bearing block 31. However, the drive chain 38 will be maintained in uniform tension by action of the spring 48 on the take-up sprocket 40 and the drive of the drums 14, 15 will not be affected.

Obviously those skilled in the art may make various changes in the details and arrangement of parts without departing from the spirit and scope of the invention as defined by the claim hereto appended, and applicant therefore wishes not to be restricted to the precise construction herein disclosed.

Having thus described and shown an embodiment of the invention, what it is desired to secure by Letters Patent of the United States is:

A material reducing apparatus comprising a main frame, a rotatable drum including material reducing hammers, bearing means rotatably mounting the drum on the main frame, means slidably mounting the bearing means on the main frame for adjusting the position of the drum, an adjusting frame slidably supported on the main frame, means connecting the bearing means to the adjusting frame for adjustment of the position of the bearing means by the adjusting frame including yieldable means interposed between the bearing means and the adjusting frame permitting movement of the bearing means relatively to the adjusting frame, means for securing the adjusting frame to the main frame in se lected position to maintain the drum in adjusted position including shims interposed between the main frame and the adjusting frame to fix the position of the adjusting frame relatively to the main frame.

References Cited in the file of this patent UNITED STATES PATENTS 1,083,033 Rossberg Dec. 30, 1913 1,730,906 Voegel Oct. 8, 1929 2,086,659 Armstrong July 13, 1937 2,481,201 Collier Sept. 6, 1949 2,558,321 Steinmetz June 26, 1951 

